Meter, Field Strength, Hand (40Mc/s-8s0Mc/s).
ACO . WITHDRAWN .
level in DMl/l.
CHl/12A, pegs 47, 85.
measuring detected tone
switching for a spare
Replacement for UN7/2.
Tone Level Meter for measuring detected tone level in
DMl/l used to indicate the tone state of the Open
Unviersity tone switching system. Also embodies switching
for a spare locally mounted tone generator. Replacement
for UN7/2. CHl/l2A, pegs 47, 85. DD 1971. OBSOLESCENT.
Tone Level Panel for use at MF transmitters on the Open
Unviersity (radio) tone system. Portable version of
ME1/6, in diecast box. SCPD 1971. OBSOLESCENT.
Noise Measuring Set. Measures random noise in the
presence of a test signal on 405, 525 or 625 line system.
Bandwidth l50kc/s to 10Mc/s. Used with external amplifier
MElA/SOl to extend upper limit of signal/noise ratio
measurement from 60dB to 70dB. CS2/7D carrying case.
Mains operated. Valves: 18 E88CC, 2 E180F, 2 85A2, 2
A2293. Superseded by MEl/507P. DD 1961. DD Spec 9.32.
DDHB 9.31. ACO. OBSOLESCENT.
Noise Measuring Meter comprising CHl/33 with ME1/504,
PS2/l3F (or PS2/48 of mains supply not always available).
DD Spec 9.76.
EDI l0003APR69. ACO. OBSOLESCENT.
Noise Measuring Meter used in MElM/503 to measure signal
to noise ratio at a point of standard signal level within
the range 20dB to 85dB (peak to peak signal to r.m.s.
noise) in the absence of a signal. CHl/12C, pegs 6, 38.
DD 1966. DD Spec 9.77. ACO. OBSOLESCENT.
Drop Out Recording Meter for obtaining a permanent record
on a chart of drop out and long edge tapes on replay of a
video tape to determine acceptability or need for editing
Signal Power Meter
over a wide range of
part of UN2M/506.
for measuring signal power accurately
frequencies. First used basically as
Gated Noise Measuring Meter for measurement of noise in
the presence of a Test Signal. Transistorised replacement
CHl/33 with sub-units mounted in
DD 1970. CANCELLED.
Field Interval Noise Meter for measuring the signal/noise
ratio of a system under "on line" conditions. Measures
the signal on an unused line in the field blanking period.
Comprises PN3A/16D with MEl/509, PS2/93K. Superseded by